1. n. Abbreviation for
‘semicolon’, when speaking. “Commands to
grind are prefixed by semi-semi-star” means
that the prefix is ;;*, not 1/4 of a star.

2. A prefix used with words such as ‘immediately’ as a
qualifier. “When is the system coming up?”
“Semi-immediately.” (That is, maybe not for an hour.)
“We did consider that possibility semi-seriously.” See also
infinite.